This app was mentioned in 3 comments, with an average of 1.33 upvotes
I've always used the Irish Radioplayer app: https://play.google.com/store/apps/details?id=ie.radioplayer.android&hl=en_IE&gl=US
Only downside for me is lack of support on Google TV
Link to Irish Radio Player
https://play.google.com/store/apps/details?id=ie.radioplayer.android
RTÉ should just license and re-skin this app.
I'll take this opportunity to plug the excellent Irish Radio Player. Far superior to any RTÉ app.
https://play.google.com/store/apps/details?id=ie.radioplayer.android